Door apparatus for dental units and the like



D. J. BINUS March 12, 1946.

I DOOR APPARATUS FOR DENTAL UNITS AND THE LIKE 4 Sheets-Sheet l Filed Feb. 15, 1944 J. Bz'nws March 12, 1946.

DOOR APPARATUS FOR DENTAL UNITS AND THE LIKE D. J. Bmus Filed Feb. 15, 1944 4 Sheets-She t 2 David J Binus March 12, 1946. 1 D. J. BINUS 2,396,311

DOOR APPARATUS FOR DENTAL UNITS AND THE LIKE Filed Fb. 15, 1944 4 Sheets-Sheet 3 1 a V 20 A 39\ l6al ' March 12, 1946.

D. J. mus 2,396,311

DOOR APPARATUS FOR DENTAL UNITS AND THE LIKE Filed Feb. 15, 1944 S W David fiz'nas 4 Sheet-Sheet 4 Patented Mar. 12, 1946 i y .i

noon APPARATUS For; DENTAL UNITS AND THELYKE David Binus, Canton, Qhio, assignor to' The Weber Dental Manufacturing Qompany Canton, Ohio, a corporation. of Ohio Application Fcbruary 15, 1944, SeriaI -NOJZZ'ABT (o1. era-22) 15 Claims.

The'invention relates to door apparatus for dental units and the like; including a mounting member such as a door frame, a door or swinging member operatively mounted for swinging movement on the mounting member, and a slide operatively mounted for sliding on the swinging member;

In a dental unit, the doormay'swing to and from closed and open positions in the door frame openingof an instrument panel compartment, and the' slide may be an instrument mounting bracket, the operation being such that when the door isswung about a horizontal hinge axis to an open position with respect to the opening, the instrument mounting bracket slide with the instruments mounted thereon slides outwardly onthe doorawayfrom its horizontal hinge a-x-is.

Various arrangements of such door apparatus have been used inan effort to obtain automatic operation of theswinging-and' slide parts with respect to eachother, but prior to the present improvements none havebeen satisfactory to the desired degree in providing a definite and certain repeating cyclical operation of theparts without interference, and at the same time being of simplified construction and arrangement enabling rapid'a-nd economical production of the parts and easy and correct-assembly and disassembly of the parts;

The objects of the present invention'include theprovisi'on of door apparatus for dental units and the like in which a slide is operatively' mounted on a swinging member, and in which relative movement of the' parts is obtained in a-positive manner so that the relative movements are exactly repeated in definite cycles without the use of pulleys and belts, thereby providing improved operating characteristics:

Further objects of the present invention include the provision of'su'ch' door apparatus in which the parts are of simplified construction and arrangement; whereby the parts maybe rapidlyand economicallymanufa'ctured, and easily and correctly assembled and disassembled, so that theapparatus as a wholemaz be economicall produced and maintained.

The foregoing and other objects are attained by the-door'app'aratus; parts;combinations, and-subcombinations which comprise the present invention; and the nature: of whichis set forth in the following general statement, and preferred embodiments of which are set' forth in: the following description, and which are particularly and distinctly pointed out andsetforth in the: appended claims formingparthereof. 5

\ The nature 'ofthe improved door apparatus of the present invention may be stated in general terms as including a mounting member, a swingingmember operativelymounted for swinging movementon theniountingmember, and a slide operatively mdunt'ed for sliding on the swinging member; and gearing and linkage means operatively" associated with the slide and swinging "member for automatically moving the slide in repeating cycles during operation of the swinging member. 7

Byway of example, preferred embodiments of the door apparatus of the present invention and of improved partsthereof, are illustrated in'the accompanying drawings forming part hereof in which Figure I is a fragmentary el'evat'ional viewwith portions in section showing a dental unit including one embodiment of the improved door appa 'ratus' hereof; the" doorparts being shown in their relative positions when the door is closed;

Fig;2; afr'ag'mentar'y viewlooking in the direction ofthearroWsi-J, Fig. 1;

Fig.. 3, a. view similar to Fig. 1, the door parts being shown in their relative positions when the door is. open; and

Fig; 4, affragmentary view looking in' the direction ofthe' arrows 4+6, Fig; 3.

Similar" numeral refer to" similar parts tHldlIghdlit' the SEVEI'SZI ViEW'S'.

The dental unit indicated generally by [U ineludes ahollowjstandard' or column I I having an upper'compartment II in which is located an instrumentpanei lii'at the rear of the door frame indicated generally by it formed in front walls ofthe column I I.

The door frame [4 surrounds the door opening 15; and a door lG-is operatively mounted. on the column II as by hinge means Him for swinging to and from. closing position in the door opening 15 ofthe door frame I4;

The hinge meansilfia may beusual pivot hinge means but as shown each hinge means [6a includesan arcuately' slotted plate Hid-l secured to the door I 6;: the arcuate slot of the plate riding on a pin l.6c 2 extending: from one side of the door frame I4. This arcuate slot and pin hinge means l-6a hasbeen incommon use.

The column it and its door frame M thus constitute a mounting. member in which the door or swinging member i6 is operatively mounted for swinging about-a horizontal hinge axis.

Onithezinner face of the: door or swinging member l6 ,;guide=means are operatively'mounted and includezlaterally spaced parallel guide channels generally by 2i are operatively associated with the swinging member I6, and the slide member 2!), and the mounting member I.

As shown, the gearing and linkage actuating means 2| includes a generally cylindric rack member indicated generally by 22 having slide bearing portions 23 and 24 at its opposite ends, and central annular rack teeth 25 and rack grooves 25 forming opposite sets of rack teeth and grooves in any diametral plane of the rack mem ber 22.

- The door lb is generally rectangular as shown and has a central axial plane indicated by the dot-dash line 21 at right angles to the axis of the hinge means 16a indicated by the dot-dash line 28. The longitudinal axis of the generally cylindric rack member 22 is in the plane 21. Cylindric vslide bearings 23 and 3e are coaxial with each other and longitudinally spaced from each other and are secured on the inner face of the door !6,

and the cylindric rack member 22 i slidably located in the bearings 29 and 30.

Between the bearings 29 and 30 and on opposite sides of the rack member 22, pinions Sid and 3|b are pivotally mounted on the inner face of the door as shown by pivot screws 32a and 32b, and the teeth of the pinions 3la and 3H) are meshed with the teeth portions at opposite sides of the rack rod 22.

As shown the pinions 3m and 3") are sectoral and are integrally formed on the inner ends of links or arms 33a and 331) respectively. The outer ends of links 33a and 331) are provided with pivotal connections 34a and 341) respectively with ends of links 35a and 35b, the other ends of which are provided with pivotal connections 35a and 36b respectively with the slide 20. j

. The axes of the pivotal connections 36a and '36b are equally spaced from the, axial'plane 21 perpendicular to the axis 28; thelinks'35a and 35b are equal in length between their pivot axes; and the links 33a and 332) are equal in length between their pivot and pinion axes. The outer sides of the links 33a and 33b are provided with stop projections 31a and 31b respectively for abutment against the opposite sides of the cylindric guide bearing 29 when the slide 20 is in the ex tended position shown in Figs. 3 and 4,

Expanding V arm spring means 38a and 381) are operatively associated with the link arm 33a and pinion 3 la, and with the arm 33b and pinion 3Ib respectively, and with the pivots 32a and 32b and with opposite sides of the bearings 30, urgin movement of the link arms 33a and 331) towards the outer upper end 39 of the door I5.

Th V arm spring means 38a, for example, in-

eludes a central spring coil which engirdles the brackets 43a and 43b, the other legs of which are secured to the inner face of the front wall of the column H below the door hinge axis 28.

The instrument mounting bracket slide 23 as shown includes a plurality of tubular holders M and 45 in each of which is inserted in a usual manner an instrument as shown, which may be served in a usual manner by a flexible tubular conduit extending into the column H.

Each guide channel I8 has a lower end portion l8! substantially parallel with the inner face of the door [6 and an upper portion !8-2 which is angled with respect to the lower portion l5l, the channel portions l8! and 3-2 having a central apex junction |8-3, and the upper channel portion l82 sloping from the junction l8--3 away from the inner face of the door 16.

The slide 20 preferably as shown includes a rectangular panel 2fll extending laterally between the guide channels 18, the sides 2!l2 and 2ll3 of the panel 2Bl preferably being located adjacent but not extending into the channel opening I9. At each side 282 and 203 of the panel 28-! are secured a pair of spaced tongues 20-4, the extremities of each tongue extending with clearance into one of the channel groove openings l9.

In operation, when the door 16 is closed, the parts of the improved door apparatus are in the relative positions shown in Figs 1 and 2 with the instrument mounting bracket slide 20 retracted in the guide channels l8 to its position closest to the lower end of the door 15.

Upon opening the door It to the positions shown in Figs. 3 and 4, the preferred rack and pinion gearing and linkage actuating means 2i operates so as to slide the rack member 22 and the bearings 29 and 30 with respect to each other so that the end portion 24 of the rack member 22 extends below the bearing iifi, whereby the pinions Bid and 3H) are rotated towards the lower end of the door and arms 33a and 331) are swung outwardly towards the outer end 39 of the door,

thereby moving the slide 20 in the guide channels l8 so that it slide first parallel with the inner face of the door Him the channel portions I8l and then slides and swings upwardly away from the inner face of the door [6 in the channel portions I82. In its outwardly extended position shown in Figs, 3 and 4, the instruments carried in the instrument bracket slide 20 are accessible .Thus there is no interference of the parts with each other or with the instrument carried on the slide 20. I 7

The embodiments of the present improvements illustrated and described herein are by way of example, and the scope of the present invention is not limited to the same or to the particular details thereof, but is commensurate with any and all novel subject matter contained herein which may at any time properly under the United States patent laws be set forth in the claims hereof or originating herein, and the elements .of any such claims are intended to include their, reasonable, mechanical and functional equivalents."

aeoaarr apparatus including: members movable with respectto: each other; amounting member, a swinging" member operatively mounted for swinging movement on thexmounting' member, a slide operativelymounted "for sliding on the swinging member, and gearing and Iinkagemeans operatively associated with the slide and swinging member for automatically moving the-slide during movement of the swinging member.

2; In apparatus including members movable with respect toeach other, amounting member, a swinging member operatively'mounted for swinging movement on the mounting member, a slide operatively mounted for sliding on the swingingmembenand rack and pinion gearing and linkage means operatively 7 associated with the slide and swinging member for automatically moving the slide during movement of the swinging member. I

3 In apparatl-is including members: movable withrespect-to each other, a mounting member, a movable member operatively mounted for movement towards and away from themounting member; a slide operatively mounted for sliding on the movable member, and gearing and linkage means operatively associated with the slide and movable member for automatically moving the slide during movement of the movable member.

4. In apparatus including members movable with respect to each other, a mounting member, a movable member operatively mounted for movement towards and away from the mounting member, a slide operatively mounted for sliding on the movable member, and rack and pinion gearing and linkage means operatively associated with the slide and movable member for automatically moving the slide during movement of the movable member.

5. In apparatus including members movable with respect to each other, a mounting member, a first movable member operatively mounted for movement towards and away from the mounting member, a second movabl member operatively mounted for movement on the first movable member, and gearing and linkage means operatively associated with the members for automatically moving the second movable member during movement of the first movable member.

6. In apparatus including members movable with respect to each other, a mounting member, a first movable member operatively mounted for movement towards and away from the mounting member, a second movable member operatively mounted for movement on the first movable member, and rack and pinion gearing and linkage means operatively associated with the members for automatically moving the second movable member during movement of the first movable member.

7. In apparatus including members movable with respect to each other, a mounting member, a first movable member operatively mounted for movement towards and away from the mounting member, a second movable member, means operatively mounting the second movable member on the first movable member for movement of the second movable member towards and away from the first movable member, and gearing and linkage means operatively associated with the members for effecting the movement of the second member during movement of the first member.

8 In: apparatus including members movable with respect to each'other, a: mounting member, a first movable member operatively mounted {or movement towards and away from the mounting mem r, a" second movable member, means op:- er'atively mounting the second 'nrovablei member for-sliding on the? first movable member and for movement of the second movablemember towa'r'ds and away "from? the firstmovable member; and means operativelyfassociated with the members for effecting: the" movement of the. "second member during movement of the first'm'ember. A 9. In apparatus including members movable with respect-to each other; a mounting member;

a'fi'rst movable member operatively mounted for movementtowards and away from theimounting member, a second movable member; means operativelymounting the second movable. member for sliding on the first movable member and for movement ofthe second movable member towards" and away from the first movablemember, and gearing and linkage means operatively associated With 'the members for. effecting the movement: of the second member duringnmovement of the firstmem ben 10. In apparatus including members movable with respect to each other, a mounting member, a first member, means mounting the first member for movement with respect to the mounting member, a second member, means mounting the second member for movement with respect to the first member, a rack, means mounting the rack for reciprocation on the first member, first linkage means operatively connecting the rack with the mounting member, a pinion journaled on the A first member and meshed with the rack, and

second linkage means operatively connecting the pinion with the second member.

11. In apparatus including members movable with respect to each other, a mounting member, a first member, means mounting the first member for movement with respect to the mounting member, a second member, means mounting the second member for movement with respect to the first member, a rack, means mounting the rack for reciprocation on the first member, first linkage means operatively connecting the rack with the mounting member, a pinion journaled on the first member and meshed with the rack, and second linkage means operatively connecting the pinion with the second member, the second linkage means including a pair of links, means pivotally connecting the pair of links with each other, means pivotally connecting one of the links with the second member, and the pinion being connected with the other link.

12. In apparatus including members movable with respect to each other, a mounting member, a first member, hinge means mounting the first member for movement with respect to the mounting member, a second member, means mounting the second member for movement with respect to the first member, a rack, means mounting the rack for reciprocation on the first member, first linkage means operatively connecting the rack with the mounting member, a pinion journaled on the first member and meshed with the rack, and second linkage means operatively connecting the pinion with the second member.

13. In apparatus including members movable with respect to each other, a mounting member, a first member, hinge means mounting the first member for movement with respect to the mounting member, a second member, means mounting the second member for movement with respect to the first member, a rack, means mounting the rack for reciprocation on the first member, first linkage means operatively connecting the rack with the mounting member, a pinion journaled on the first member and meshed with the rack, and second linkage means operatively connecting the pinion with the second member, the second linkage means including a pair of links, means pivotally connecting the pair of links with each other, means pivotally connecting one of the links with the second member, and the pinion being connected with the other link.

14. In apparatus including members movable with respect to each other, a mounting member,

a first member, means mounting the first mem-' ber with respect to the mounting member, a second member, means mounting the second member for movement with respect to the first member, a rack member having rack teeth and grooves on opposite sides, means mounting the rack member for reciprocation on the first member, first linkage means operatively connecting the rack member with the mounting member, a pair of pinions journaled on the first member, each pinion being on one side of the rack member and meshed with the rack teeth and grooves on that side of the rack member, and two sets of second. linkage means, each second linkage means operatively connecting one of the pinions with the second member.

15. In apparatus including members movable with respect to each other, a mounting member, a first member, means mounting the first member with respect to the mounting member, a second member, means mounting the second member for movement with respect to the first member, a generally cylindric rack member having annular rack teeth and grooves, cylindric bearing means mounting the generally cylindric rack member for reciprocation on the first member, first linkage means operatively connectin the rack member with the mounting member, a pair of pinions journaled on the first member, each pinion being on one side of the rack member and meshed with the rack teeth and grooves on that side of the rack member, and two sets of second linkage means, each second linkage means operatively connecting one of the pinions with the second member.

DAVID J. BINUS. 

